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Tin Lead Solder Wire Sn63Pb37 63 37


Tin Lead Solder Wire Sn63Pb37 63 37

Solder Wire 63 37 Tin Lead Solder Wire Sn63Pb37, also known as Solder Wire 63 37, is a soldering material renowned for its precise composition of 63% tin (Sn) and 37% lead (Pb). This solder wire is crafted to offer enhanced fluidity and adhesion, making it a preferred choice for applications requiring strong and reliable solder joints. This solder is cast into wires and winded into rolls, making it handy for soldering. It has been a cornerstone of soldering applications, revered for its optimal balance of melting point and malleability. The alloy forms a eutectic composition with a well-defined melting point, ensuring consistent and efficient soldering.


Specifications of Tin Lead Solder Wire Sn63Pb37 63 37:

Alloy Composition        

63% Tin (Sn), 37% Lead (Pb)

Melting Point 


Flux Type

Rosin based

Flux Content

2.0% as standard, or customized flux percentage

Wire  Diameter

0.5mm to 3.2mm


100g/roll, 200g/roll, 500g/roll to 1kg/roll or customized weight


XF Solder or OEM service

*We also produce solid wire without flux core

Different Weights of Solder Wire

Different Weight Options

Different Diameters of Solder Wire

Different Wire Diameters

Rosin Flux Core Tin Lead Solder Wire

Rosin Flux Core

Features of Tin Lead Solder Wire Sn63Pb37 63 37:

Eutectic Alloy

The melting point and solidifying point of solder wire 63 37 is same, there is no plastic range for this alloy. That makes it very easy to use even for beginners.


Excellent Wetting & Fluidity

Solder Wire 63 37 has exceptional wetting and flowing properties, making the solder well flow and spread on the soldered components to get nice solder joints.

Flux Core

It contains neutral rosin flux core and there is no need to apply flux in separate during soldering. The rosin flux core helps the solder to fast melt and evenly flow to cover the soldering area.

Low Melting Temperature

The melting point is only 183℃ which is lower than most of other solder alloys. It's easy to melt and handy to use.


Affordable Price

Comparing to lead free solder wires, solder wire Sn63Pb37 is at least 30% cheaper. That greatly reduce the manufacturing cost of electronics.

Flexible Packing

This solder wire comes in both small package like 100g/roll up to big package like 1kg/roll. That provides flexibility for customers to select an amount without wastage.


Applications of Tin Lead Solder Wire Sn63Pb37 63 37:

Electronics Production: Solder Wire 63 37 is used in electronics assembly, ensuring reliable connectivity in PCBs and components. Such televisions, smartphones, laptops and computers

refrigerators, washing machines, LED lighting.


Industrial Devices: Solder wire Sn63Pb37 is used for assembly of electrical parts inside the industrial devices, such as solar panels, machine control board, auto car components etc.


Repairs and DIY projects: It's also used for repairing of electronics or electrical devices, or for hobbyists to use for their DIY projects.

Manual Soldering with solder wire

Manual Soldering

Robot Soldering with solder wire

Automatic Soldering

jewelry making with solder wire

Metal Joinery


How to use Tin Lead Solder Wire Sn63Pb37 63 37?

Manual soldering: we need solder irons or soldering stations to conduct the manual soldering. It’s flexible way of manufacturing that allows workers to carry out the soldering work basing on requirements.


Automatic soldering: Ideal for mass production, automatic soldering machines feed and melt the solder wire, ensuring standardized joints.


Precaution for using Tin Lead Solder Wire Sn63Pb37 63 37:

Use in a Well-Ventilated Area: Always solder in a well-ventilated space, such as a fume hood or near an open window, and use exhausting fan. Proper ventilation helps to dissipate harmful fumes and reduce the risk of inhaling lead vapors.


Wear Personal Protective Equipment (PPE): Consider wearing appropriate personal protective equipment, including safety glasses, gloves, and a lab coat or apron, to minimize skin and eye contact with solder and flux.


Avoid Ingestion and Hand-to-Mouth Contact: Never eat, drink, or smoke while working with leaded solder. Wash your hands thoroughly after handling solder and before eating or touching your face.


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